Picker-stick check



1, w. HERBERT AND J. A. ANDREWS.

PICKER STICK CHECK. RPPLICATION F'ILED APRLZII I920.

Patented Feb. 22, 1921.

2 SHEETS-SHEET l-.

I um mm-mmum l. W; HERBEIT AND A. ANDREWS,

- PICKER SIICK CHECK. APPLICATION mph APR. 21 1921 1,369,-430. Patent/ad Feb. 22,1921.

2v SHEETS-SHEET 2- w' "'"IIIIIIII lmllllll i UNITED STATES PATENT OFFICE.

JAMES A. ANDREWS AND JOHN w. HERBERT, or BIDDEFORD, MAINE.

PICKER-STICK CHECK.

Specification of Letters Patent. Patented Feb. 22 1921 Application ,filed April 21, 1920. Serial No. 375,490.

To all whom it may concern: 7

Be it known that we, Janus A. ANDREWs and JOHN VJ. HERBERT, citizens of the United States, residing at Biddeford, in the county of York and State of Maine, have invented new and useful Improvements in Picker-Stick Checks, of which the following is a specification.

This invention relates to certain new and useful improvements in a picker stick check and more especially 011 the construction of check described and claimed in our Patent No. 1,322,789, which was issued November 25, 1919.

In our former construction the check strap was steadily fed around by means of the pick stick to continuously present a new portion to the stick. The present invention has for its object to provide an improved construction wherein the check strap can be arrested and held securely and firmly in a set position whereby the stick will engage a definite section or portion of the strap.

A further object is to provide an improved check in which is embodied a brake or friction shoe mounted to engage the strap "and releasably but firmly secure the same whereby the strap may be. retained in a set or fixed position until the stick has worn one spot or portion, and then released to present a new portion of the strap to the stick, and the strap again fastened.

In the drawings:

Figure 1' is a side elevation of the picker stick check embodying the present invention; 1

Fig. 2 a transverse, vertical section therethrough on line 2-2 of Fig. 1;

Fig. 3 is a bottom plan view thereof; and

Fig. 1 is a horizontal, lengthwise section of the same;

Referring more in detail to the drawings, the shuttle box 1 has secured toits opposite sides a pair of brackets 2 from which suspend the check strap guides 3 and 4 which are substantially U-shaped and positioned to open. laterally outward, as depicted in Fig. 2. v

The U-guide a is inclined lengthwise of the box and in the direction of the swing of the pick stick (not shown), and has its lower or bottom side 6 extended lengthwise in both directions whereby to provide a broad and elongated support for the check strap 7. A bolt 8,, having a retaining nut 9, is passed vertically through registering apertures in the upper and lower sides of the-U-guide 4- to provide a pivotal mounting for a cam frame 10 which has an active, eccentric part 11 and an oppositely extendmg lug or arm 12.

Interposed between the bearing part 11 and the strap 7 is the brake or friction shoe 13 which is more or less wedge-shape, having a flat active face engaging with the strap and a curved-bearing or camming face 14 at one end of its opposite face on which the bearing part 11 acts to force the shoe into firm frictional engagement with the strap. The opposite end portion of the outer face of the shoe is formed witharecess or seat for the convexed end of screw 15 which is threaded through the lug 12 and isdesigned to exert a downward pressure on the adjacent end of the shoe and an upward pressure on the lug through which the bearing part is caused to exert a downward force on the opposite end of the shoe and thereby secure the strap in position. A spring 16 is coiled about the bolt 8 and has one terminal bearing downwardly on the camming part 11 and its opposite end anchored to the bottom 6 of theU-guide, as indicated at 17.

In practice, to secure the strap against movement, the screw 15 is tightened down onto the friction shoe, which operation causespressure on the shoe at each end, To release the strap it is only necessary to unscrew the pressure screw 15 sufiicient to relax on the shoe but without withdrawing the screw from its seat in the shoe. Thus, while the pressure is released the shoe is held from slipping with the strap by reason of the spring 16 acting on the camming part so that additional retaining means for the shoe or block is not required. With this construction the strap is caused to wear in one place until it is manually or predeterminedly adjusted to another position as when, in the judgment of the operator, the

circumstances require.

It will be noted that when the strap is released, the action of the pick stick will gradually feed the strap to present a new portion to the stick, since any tendency of the strap I to move in the wrong direction will be resisted by means of the shoe wedging togcther with the camming part 11 and thereby effect a gripping of the strap.

The construction is simple and can easily be applied to structures embodying our former features by substituting the cam and shoe for the single cam formerly emplo ed.

aving thus described our invention, what we claim as new and desire to secure by Letters Patent is r 1. A picker stick check comprising a U- guide for the check strap, a cam member pivoted for movement between the sides of the guide and including a lug member extending on the opposite side of the pivot,

a friction shoe underlying the cam member and formed at one end with a wedge surface for engagement by the cam member earing downwardly on the camining part,

and a pressure screw threaded through the lug and engaged in the seat to exert down{ ward pressure on the adjacent end of the shoe and upward pressure on the lug.

3. A picker stick check comprising a U-' guide for the check strap, acam member pivoted for movement between the sides of the ide and including a lug member extending on the opposite side of the pivot, a friction shoe underlying the cam member, and means for exerting downward pressure on the shoe and upward pressure on the lug member to effect engagement of said shoe by said cam member.

4. A picker stick check comprising an endless strap, a guide therefor, a friction shoe engageable with the strap and formed at one end with an upwardly directed wedge surface, a cam member pivoted on the guide and engaging the wedge surface for pressing the shoe against the strap, and means for rendering the cam member operative and for holdlng the shoe against movement with the strap.

5. A pick stick check comprising an endless strap, a guide therefor, a friction shoe 7 A pick stick check comprising an end less strap, a guide therefor, a shoe for securing the strap against movement in the guide, means at each end of the shoe for exerting pressure thereon, and a single means for controlling the pressure exerted by said means.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses. JAMES A. ANDREWS J. W. HERBERT. Witnesses:

MABELLE SMITH. CHAs. M. HODGDON. 

